CN212454253U - Vector tooth arrangement roller bit - Google Patents

Abstract

The application relates to a vector cloth tooth roller bit belongs to the roller bit technical field in oil and gas and mining well drilling field, and roller bit includes: the bit of the roller bit is at least provided with a bit leg and a roller, the top end of the bit leg is provided with a thread, and the bottom end of the bit leg is provided with a shaft diameter which is rotationally connected with the roller; the same row of the gear is provided with a plurality of cutting teeth, and the tooth crest direction of at least one cutting tooth in the plurality of cutting teeth on the same row is different from the tooth crest direction of the rest cutting teeth, so that the plurality of cutting teeth form a vector tooth distribution row. The tooth tops of the cutting teeth on the vector tooth distribution row of the roller bit are distributed in different directions, so that the crushing area of a single cutting tooth is reduced, the aggressiveness of the cutting tooth can be effectively improved, and the efficiency of drilling and milling a bridge plug is improved. Meanwhile, the toughness and the strength of the cutting teeth can be effectively enhanced, and the cutting fracture phenomenon is reduced. Thereby achieving the purposes of improving the drilling and plugging efficiency and the number of the drilling and plugging of a single bit and prolonging the service life of the roller bit.

Description

Vector tooth arrangement roller bit

Technical Field

The application relates to the technical field of roller bit in the field of petroleum and natural gas and mining and drilling, in particular to a vector tooth arrangement roller bit.

Background

Conventional roller cone bits include at least one leg and one cone, and typical roller cone bits include three legs and three cones. Existing roller cone drill bits include both milling and insert cones. The cutting teeth of the milling tooth cone are formed by milling a cone body, and wear-resistant materials are welded on the surfaces of the milling teeth in a laying mode. The insert cone is provided with a plurality of tooth rows on a cone body, each tooth row is processed with a plurality of tooth holes, and hard alloy teeth are embedded in the tooth holes to be used as cutting teeth. The roller bit adopting the milling tooth cutting structure is a milling tooth roller bit or a steel tooth roller bit, and the roller bit adopting the insert cutting structure is an insert roller bit. There is also a roller cone bit with a mixed milling and insert structure, called a steel insert hybrid roller cone bit. Each cone contains a number of rows of teeth, with the row of teeth closest to the base plane of the cone being the outer row of teeth and the remaining rows of teeth being referred to as the inner rows of teeth.

In recent years, with the development of shale gas development technology and the change of drilling process, bridge plugs are widely used for separate-layer water injection, separate-layer oil testing, separate-layer fracturing acidification, separate-layer production and seal operation of sealing water layers, sealing dry layers, sealing waste layers and the like in the process of petroleum exploration and development, and the application field of roller bit is gradually expanded to the operation of drilling and milling the bridge plugs.

In the drilling and milling operation of the bridge plug, a coiled tubing is usually connected with a screw drill and then connected with a drill bit; the coiled tubing functions to provide weight on bit and move the drill bit forward, and the progressive cavity drill is used to drive the drill bit to rotate. The drill bit rotates to break the bridge plug under the action of certain bit pressure.

Referring to fig. 1, after the bridge plug is placed at a predetermined position in the casing, a sealing ball 401 is put in, pressure is applied from the upper part, an upper slip 403 and an upper cone 404 are pushed to move downwards and relatively to a central pipe 402, a sealing rubber cylinder 405 is pressed, the sealing rubber cylinder 405 is expanded and tightly attached to the inner wall of the casing, the purpose of sealing the upper layer and the lower layer is achieved, and meanwhile, the upper slip 403 and the lower slip 407 move outwards under the action of the conical surface and are clamped on the inner wall of the casing, so that the anti-loosening effect is achieved. The materials of the sealing ball 401 and the central tube 402 are usually polymer composite materials, soft metals and the like; the material of the packing rubber cylinder 405 is typically rubber; the material of the upper slip 403 and the lower slip 407 typically comprises cast iron blocks.

When the milling tooth roller bit is used for drilling and milling the bridge plug, the defects of poor abrasion resistance of cutting teeth and small quantity of the cutting teeth for drilling and milling the bridge plug exist. When the insert roller bit and the steel insert mixed roller bit are adopted to drill and mill the bridge plug, the number of cutting teeth capable of drilling and milling the bridge plug is large, but the two defects exist: firstly, the tooth crest directions of all the cutting teeth are parallel to the rotation direction of the drill bit, the contact area between the cutting teeth and a crushing target is large, the aggressiveness of the cutting teeth is not strong, and the crushing efficiency is low; secondly, when the drill meets the cast iron block, the cutting teeth on the outer tooth row of the cone are easy to break, thereby influencing the service life of the drill bit.

Disclosure of Invention

The embodiment of the application provides a vector tooth arrangement roller bit, which aims to solve the problems that the cutting teeth of the roller bit in the related technology are not strong in aggressiveness and low in crushing efficiency; when a drill encounters a cast iron block, the problem of cutting tooth fracture on the outer row of teeth of the cone is likely to occur.

Embodiments of the present application provide a vector tooth arrangement roller cone drill bit, which includes:

the roller bit is at least provided with a bit leg and a roller, the top end of the bit leg is provided with threads to be connected with a drill rod or a screw rod, and the bottom end of the bit leg is provided with a shaft diameter to be rotationally connected with the roller;

the gear wheel is provided with a plurality of tooth rows, a plurality of cutting teeth are distributed on the same tooth row, and the tooth crest direction of at least one cutting tooth in the plurality of cutting teeth on the same tooth row is different from the tooth crest direction of the rest cutting teeth, so that the plurality of cutting teeth on the same tooth row form a vector tooth distribution tooth row.

In some embodiments, at least one cutting tooth in the vector row has an addendum direction that is perpendicular to a direction of rotation of the roller cone drill bit and at least one cutting tooth in the vector row has an addendum direction that is parallel to the direction of rotation of the roller cone drill bit.

In some embodiments, the included angle between the tooth crest direction of at least one cutting tooth in the vector tooth distribution row and the tooth crest direction of the rest cutting teeth is 0-90 degrees.

In some embodiments, the vector row of teeth is disposed on an outer row of teeth or/and an inner row of teeth of the cone.

In some embodiments, the cutting elements comprise cemented carbide inserts and milling teeth, and the roller cone is provided with a plurality of insert rows and/or milling tooth rows and/or steel insert mixed tooth rows;

the hard alloy teeth are embedded on the embedded tooth row, the milling teeth are arranged on the milling tooth row, and the hard alloy teeth and the milling teeth are alternately arranged on the steel embedded mixed tooth row.

In some embodiments, the cemented carbide tooth is a wedge tooth, a partial wedge tooth, or a spoon tooth, and the cemented carbide tooth has a cobalt content of 10% to 25%.

In some embodiments, the diameter of the cemented carbide tooth is 6-20 mm, and the diameter of the cemented carbide tooth positioned on the outer row of the roller cone is 100-200% of the diameter of the cemented carbide tooth positioned on the inner row of the roller cone.

In some embodiments, the number of the cutting teeth on the same tooth row is even, the addendum direction of the even-numbered cutting teeth is perpendicular to the rotation direction of the roller cone bit, the addendum direction of the odd-numbered cutting teeth is parallel to the rotation direction of the roller cone bit, and the odd-numbered cutting teeth and the even-numbered cutting teeth are arranged at intervals.

In some embodiments, the roller cone drill bit is a tri-cone drill bit comprising a first roller cone, a second roller cone, and a third roller cone, at least one of the first roller cone, the second roller cone, and the third roller cone being provided with the vector row of teeth.

In some embodiments, the diameters of the cutting teeth of the outer rows of the first, second, and third cones are the same or different.

The beneficial effect that technical scheme that this application provided brought includes:

the embodiment of the application provides a vector tooth distribution roller bit which is at least provided with a bit leg and a roller, wherein the top end of the bit leg is provided with a thread, and the bottom end of the bit leg is provided with a shaft diameter which is in rotary connection with the roller; the gear wheel is provided with a plurality of tooth rows, a plurality of cutting teeth are distributed on the same tooth row, and the tooth crest direction of at least one cutting tooth in the plurality of cutting teeth on the same tooth row is different from the tooth crest direction of the other cutting teeth, so that the plurality of cutting teeth form a vector tooth distribution tooth row. The tooth tops of the cutting teeth on the vector tooth distribution row are distributed in different directions, so that the contact area between a single cutting tooth and a crushed target is reduced, the aggressiveness of the cutting tooth can be effectively improved, and the efficiency of drilling and milling the bridge plug is improved. Meanwhile, the toughness and the strength of the cutting teeth can be effectively enhanced, and the cutting fracture phenomenon is reduced. Thereby achieving the purposes of improving the drilling and plugging efficiency and the number of the drilling and plugging of a single bit and prolonging the service life of the roller bit.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a prior art bridge plug;

FIG. 2 is a schematic representation of a roller cone drill bit according to an embodiment of the present disclosure;

FIG. 3 is a bottom view of a roller cone drill bit according to an embodiment of the present application;

FIG. 4 is a front view of a first cone in an embodiment of the present application;

FIG. 5 is a top view of a first cone structure according to an embodiment of the present application;

FIG. 6 is a front view of a second cone in an embodiment of the present application;

FIG. 7 is a top view of a second cone in an embodiment of the present application;

FIG. 8 is a front view of a third cone in the embodiment of the present application;

FIG. 9 is a top view of a third cone in an embodiment of the present disclosure;

FIG. 10 is a schematic representation of a roller cone drill bit according to another embodiment of the present application;

FIG. 11 is a bottom structural view of a roller cone drill bit according to another embodiment of the present application;

FIG. 12 is a front view of a steel insert hybrid cone according to an embodiment of the present application;

FIG. 13 is a top view of a steel insert hybrid cone according to an embodiment of the present application;

FIG. 14 is a front structural view of a steel insert hybrid cone according to another embodiment of the present application;

FIG. 15 is a top view of a steel insert hybrid cone according to another embodiment of the present application.

Reference numerals:

1. a roller cone drill bit; 2. a bit leg; 3. a cone; 4. cutting teeth; 5. a cone base plane; 31. a first cone; 32. a second cone; 33. a third cone; 41. hard alloy teeth; 42. and (5) milling teeth.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides a vector tooth arrangement roller bit, which can solve the problems of low aggressiveness and low crushing efficiency of cutting teeth of the roller bit in the related technology; when a drill encounters a cast iron block, the problem of cutting tooth fracture on the outer row of teeth of the cone is likely to occur.

Referring to fig. 2 and 3, embodiments of the present application provide a vector teeth placement roller cone drill bit, which includes: the roller bit 1 is at least provided with a bit leg 2 and a roller 3, the top end of the bit leg 2 is provided with a thread, the thread is connected with a drill rod or a screw rod, and the bottom end of the bit leg 2 is provided with a shaft diameter which is rotationally connected with the roller 3. For convenience of description, the embodiments of the present application are described in detail by taking a tri-cone bit composed of three bit legs 2 and three cones 3 as an example, and it is needless to say that those skilled in the art can also apply the embodiments to a single cone bit and a multi-cone bit.

The roller cone drill bit of the embodiments of the present application is a 127mm (5") diameter roller cone drill bit. The tricone bit is provided with three bit legs 2 and three cones 3, and a row of teeth of each cone 3 is provided with cutting teeth 4. The three cones 3 are respectively a first cone 31, a second cone 32 and a third cone 33, and the three cones 3 are respectively and correspondingly connected with the bottom ends of the three bit legs 2 in a rotating way.

During the process of drilling or bridge plug drilling, the upper part of the roller bit 1 is connected with a drilling tool such as a drill rod or a screw rod through threads. The rotary table or the top driver drives the drill rod to rotate, and the drill rod drives the tricone bit to rotate; or the drilling tools such as a screw and the like drive the tricone bit to rotate, the tricone bit rotates and drills according to a preset route, and the cutting teeth 4 on the cone 3 continuously impact the rock or the bridge plug so as to break the rock or the bridge plug.

Referring to fig. 4 to 9, a plurality of cutting teeth 4 are arranged on the same tooth row of the three cones 3, the cutting teeth 4 are cemented carbide teeth 41, and the cemented carbide teeth 41 are preferably wedge-shaped teeth. The tooth crest direction of at least one hard alloy tooth 41 in the plurality of hard alloy teeth 41 on the same tooth row is different from the tooth crest direction of the rest hard alloy teeth 41, so that the plurality of hard alloy teeth 41 on the same tooth row form vector tooth distribution tooth rows which are arranged on the outer tooth row and the inner tooth row of the cone 3, wherein the tooth row closest to the cone bottom plane 5 of the cone 3 is the outer tooth row, and the rest tooth rows are the inner tooth rows.

In the cone 3 of the embodiment of the present application, a plurality of cemented carbide teeth 41 are arranged on the same row, and the direction of the tooth crest of at least one cemented carbide tooth 41 of the plurality of cemented carbide teeth 41 on the same row is different from the direction of the tooth crests of the remaining cemented carbide teeth 41, so that the plurality of cemented carbide teeth 41 form a vector tooth arrangement. The tooth tops of the hard alloy teeth 41 on the vector tooth arrangement row are arranged in different directions, so that the contact area of the single hard alloy tooth 41 and a crushed target is reduced, the aggressiveness of the hard alloy tooth 41 can be effectively improved, and the efficiency of drilling and milling the bridge plug is improved.

Meanwhile, the optimized hard alloy tooth material can effectively strengthen the toughness and the strength of the hard alloy tooth 41 and reduce the cutting fracture phenomenon of the hard alloy tooth 41. Thereby achieving the purposes of improving the drilling and plugging efficiency and the number of the drilling and plugging of a single bit and prolonging the service life of the roller bit.

In some alternative embodiments, referring to FIG. 3, embodiments of the present application provide a vector gauge roller cone bit having a 4-3-4 row count for first cone 31, second cone 32, and third cone 33, with cemented carbide inserts 41 disposed on each row.

Referring to fig. 4 and 5, the number of cemented carbide teeth 41 in each row of the first cone 31 is 1, 8, 10 and 10 from the inner row to the outer row, and the diameters of the cemented carbide teeth 41 are 6mm, 8mm, 9mm and 10mm, respectively. Except for the cemented carbide teeth 41 with 1 tooth row, the tooth top directions of the cemented carbide teeth 41 in the other tooth rows are respectively parallel to or perpendicular to the rotation direction of the roller bit 1, and the tooth top directions of two adjacent cemented carbide teeth 41 in the same tooth row are mutually perpendicular and arranged at 90 degrees. Those skilled in the art can also freely set the included angle between the tooth crest directions of two adjacent cemented carbide teeth 41 of the same tooth row within the range of 0 to 90 °.

Referring to fig. 6 and 7, the number of the cemented carbide teeth 41 in each row of the second cone 32 is 2, 10 and 10 respectively from the inner row to the outer row, and the diameters of the cemented carbide teeth 41 are 8mm, 9mm and 13mm respectively. The top directions of the cemented carbide inserts 41 in all rows of the second cone 32 are respectively parallel to or perpendicular to the rotation direction of the roller cone bit 1, and the top directions of two adjacent cemented carbide inserts 41 in the same row are perpendicular to each other at 90 degrees. Those skilled in the art can also freely set the included angle between the tooth crest directions of two adjacent cemented carbide teeth 41 of the same tooth row within the range of 0 to 90 °.

Referring to fig. 8 and 9, the number of the cemented carbide teeth 41 in each row of the third gear 33 is 1, 6, 12 and 12 from the inner row to the outer row, and the diameters of the cemented carbide teeth 41 are 7mm, 8mm, 9mm and 11mm, respectively. Except for the cemented carbide teeth 41 with 1 tooth row, the tooth top directions of the cemented carbide teeth 41 of the other tooth rows are respectively parallel to or perpendicular to the rotation direction of the roller bit 1, and the tooth top directions of two adjacent cemented carbide teeth 41 of the same tooth row are mutually perpendicular and arranged at 90 degrees. Those skilled in the art can also freely set the included angle between the tooth crest directions of two adjacent cemented carbide teeth 41 of the same tooth row within the range of 0 to 90 °.

Referring to fig. 4 to 9, in the embodiments of the present application, a roller cone bit with vector teeth arrangement is provided, in which the diameter of cemented carbide 41 in the outer row of the roller cone 3 in the first roller cone 31, the second roller cone 32, and the third roller cone 33 is 100% to 200% of the diameter of cemented carbide 41 in the inner row of the roller cone 3, that is, the diameter of cemented carbide 41 in the outer row is greater than the diameter of cemented carbide 41 in the inner row, and increasing the diameter of cemented carbide 41 can effectively increase the strength of cemented carbide 41, thereby reducing the fracture of cemented carbide 41.

The diameter of the hard alloy tooth 41 is 6-20 mm, and the diameter of the hard alloy tooth 41 is determined according to the diameter of the roller bit and the metal content in the bridge plug material. The cemented carbide tip 41 is preferably, but not limited to, a wedge-shaped tip, and the cemented carbide tip 41 may also be selected by those skilled in the art as a partial wedge-shaped tip or a spoon-shaped tip. The cobalt content of the cemented carbide tooth 41 is 10-25%, preferably 20%, and increasing the cobalt content of the cemented carbide tooth 41 can effectively improve the fracture toughness of the cemented carbide tooth 41, thereby reducing the fracture of the cemented carbide tooth 41.

In some alternative embodiments, referring to fig. 10 and 11, embodiments of the present application provide a vector bit-layout roller cone drill bit, comprising: the roller bit comprises a roller bit 1, wherein at least one bit leg 2 and a roller cone 3 are arranged on the roller bit 1, the top end of the bit leg 2 is connected with the roller bit 1 into a whole in a welding mode, and the bottom end of the bit leg 2 is connected with the roller cone 3 in a rotating mode. For convenience of description, the embodiments of the present application are described in detail by taking a tri-cone bit composed of three bit legs 2 and three cones 3 as an example, and it is needless to say that those skilled in the art can also apply the embodiments to a single cone bit and a multi-cone bit.

The roller cone drill bit of the embodiments of the present application is a 127mm (5") diameter roller cone drill bit. The roller bit 1 of the tri-cone roller bit is provided with three bit legs 2 and three cones 3, and a tooth row of each cone 3 is provided with cutting teeth 4. The three cones 3 are respectively a first cone 31, a second cone 32 and a third cone 33, and the three cones 3 are respectively and correspondingly connected with the bottom ends of the three bit legs 2 in a rotating way.

During the process of drilling or bridge plug drilling, the upper part of the roller bit 1 is connected with a drilling tool such as a drill rod or a screw rod through threads. The rotary table or the top driver drives the drill rod to rotate, and the drill rod drives the tricone bit to rotate; or the drilling tools such as a screw and the like drive the tricone bit to rotate, the tricone bit rotates and drills according to a preset route, and the cutting teeth 4 on the cone 3 continuously impact the rock or the bridge plug so as to break the rock or the bridge plug.

A plurality of cutting teeth 4 are distributed on the same tooth row of the three roller cones 3, the cutting teeth 4 are cemented carbide teeth 41, and the cemented carbide teeth 41 are preferably wedge-shaped teeth. The tooth crest direction of at least one cemented carbide tooth 41 among the plurality of cemented carbide teeth 41 on the same tooth row is different from the tooth crest direction of the remaining cemented carbide teeth 41, so that the plurality of cemented carbide teeth 41 form a vector tooth arrangement, and the vector tooth arrangement is installed in the inner tooth rows of the first cone 31, the second cone 32, and the third cone 33.

The first cone 31, second cone 32 and third cone 33 have a 4-3-4 row count with carbide teeth 41 on each row. The outer rows of the first cone 31, the second cone 32 and the third cone 33, and the addendum directions of the cemented carbide inserts 41 on the inner row of only 1 cemented carbide insert 41 on the first cone 31 and the third cone 33 are parallel to the rotation direction of the roller cone bit 1, the addendum directions of the cemented carbide inserts 41 on the other rows are respectively parallel to or perpendicular to the rotation direction of the roller cone bit 1, and the addendum directions of two adjacent cemented carbide inserts 41 on the same row are perpendicular to each other at 90 degrees. Those skilled in the art can also freely set the included angle between the tooth crest directions of two adjacent cemented carbide teeth 41 of the same tooth row within the range of 0 to 90 °.

In some alternative embodiments, referring to fig. 12 and 13, embodiments of the present application provide a vector teeth-distributed roller cone bit having a cone 3 that is a steel insert hybrid cone having cutting elements 4 comprising cemented carbide 41 and milling teeth 42, the steel insert hybrid cone having two rows of inserts and one row of milling teeth, the rows of inserts being located in outer and inner rows of the cone 3 and the rows of milling teeth being located in inner rows of the cone 3, wherein the row of teeth closest to the cone base plane 5 of the cone 3 is the outer row and the remaining rows of teeth are the inner rows. The hard alloy teeth 41 are embedded on the inserted tooth row, and the milling teeth 42 are arranged on the milling tooth row.

The outer row of the steel insert hybrid cone is provided with cemented carbide inserts 41 as cutting teeth, the inner row of the milling teeth is provided with milling teeth 42 as cutting teeth, and the inner row of the insert row is provided with cemented carbide inserts 41 as cutting teeth. The outer row of teeth is provided with 12 hard alloy teeth 41, wherein the tooth crest direction of 6 hard alloy teeth 41 is parallel to the rotation direction of the roller bit 1, and the tooth crest direction of the other 6 hard alloy teeth 41 is perpendicular to the rotation direction of the roller bit. The tooth tops of two adjacent cemented carbide teeth 41 in the outer tooth row are perpendicular to each other at 90 degrees. Those skilled in the art can also freely set the included angle between the tooth crest directions of two adjacent cemented carbide teeth 41 of the outer tooth row within the range of 0 ° to 90 °.

In some alternative embodiments, referring to fig. 14 and 15, embodiments of the present application provide a vector teeth-layout roller cone bit, wherein the cone 3 of the roller cone bit is a steel insert hybrid cone, the cutting teeth 4 of the steel insert hybrid cone comprise cemented carbide bits 41 and milling teeth 42, and the steel insert hybrid cone is provided with a row of steel insert hybrid teeth and a row of milling teeth; the steel insert mixed tooth row is positioned on an outer tooth row of the roller cone 3, the milling tooth row is positioned on an inner tooth row of the roller cone 3, wherein the tooth row closest to a roller cone bottom plane 5 of the roller cone 3 is the outer tooth row, and the rest tooth rows are the inner tooth rows. The hard alloy teeth 41 and the milling teeth 42 are alternately arranged on the steel-embedded mixed tooth row, and the milling teeth 42 are arranged on the inner tooth row.

The outer tooth row of the steel insert mixed cone is provided with milling teeth 42 and hard alloy teeth 41, and the hard alloy teeth 41 and the milling teeth 42 are arranged on the steel insert mixed tooth row at intervals. The steel-embedded mixed tooth row is provided with 8 hard alloy teeth 41, and the tooth crest direction of the 8 hard alloy teeth 41 is vertical to the rotation direction of the roller bit 1; 7 milling teeth 42 are arranged at the same time, and the tooth crest direction of the 7 milling teeth 42 is parallel to the rotation direction of the roller cone bit 1.

Principle of operation

The embodiment of the application provides a vector tooth distribution roller bit, and as the roller bit of the application is at least provided with a bit leg 2 and a roller 3 on the roller bit 1, the top end of the bit leg 2 is provided with a thread which is connected with a drill rod or a screw rod, and the bottom end of the bit leg 2 is provided with a shaft diameter which is rotationally connected with the roller 3; the cone 3 is provided with a plurality of tooth rows, a plurality of cutting teeth 4 are distributed on the same tooth row, and the tooth crest direction of at least one cutting tooth 4 in the plurality of cutting teeth 4 on the same tooth row is different from the tooth crest direction of the rest cutting teeth 4, so that the plurality of cutting teeth 4 form a vector tooth distribution tooth row.

The tooth tops of the cutting teeth 4 on the vector tooth distribution row are distributed in different directions, so that the contact area of a single cutting tooth 4 and a crushed target is reduced, the aggressiveness of the cutting tooth 4 can be effectively improved, and the efficiency of drilling and milling the bridge plug is improved. Meanwhile, the cobalt content of the hard alloy tooth 41 is increased, so that the toughness and strength of the cutting tooth 4 can be effectively enhanced, and the cutting fracture phenomenon is reduced. Thereby achieving the purposes of improving the drilling and plugging efficiency and the number of the drilling and plugging of a single bit and prolonging the service life of the roller bit.

When the direction of the tooth tops of the cutting teeth 4 is perpendicular to the rotation direction of the roller bit 1, the contact area of the cutting teeth 4 and a crushing target is small in the working process, the load acting on the unit area of the crushing target is large, and the crushing efficiency of the cutting teeth 4 on the crushing target is high. The crushing target is crushed by the cutting teeth 4 with the addendum direction parallel to the rotating direction of the roller bit 1, the cutting teeth 4 parallel to the rotating direction of the roller bit 1 and the cutting teeth 4 perpendicular to the rotating direction of the roller bit 1. The cutting teeth 4 perpendicular to the rotation direction of the roller bit 1 dig in the crushed object, and the cutting teeth 4 parallel to the rotation direction of the roller bit 1 scrape the crushed object, so that the crushing efficiency of the roller bit is improved as a whole.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A vector teeth-distribution roller cone drill bit, characterized in that the roller cone drill bit (1) comprises:

the roller bit (1) is at least provided with a bit leg (2) and a roller (3), the top end of the bit leg (2) is provided with threads, and the bottom end of the bit leg (2) is provided with a shaft diameter which is rotationally connected with the roller (3);

the cone (3) is provided with a plurality of tooth rows, a plurality of cutting teeth (4) are distributed on the same tooth row, and the tooth crest direction of at least one cutting tooth (4) in the plurality of cutting teeth (4) on the same tooth row is different from the tooth crest direction of the rest cutting teeth (4), so that the plurality of cutting teeth (4) on the same tooth row form a vector tooth distribution tooth row.

2. The vector tooth placement roller cone bit of claim 1, wherein:

the tooth crest direction of at least one cutting tooth (4) in the vector tooth distribution row is perpendicular to the rotation direction of the roller bit (1), and the tooth crest direction of at least one cutting tooth (4) in the vector tooth distribution row is parallel to the rotation direction of the roller bit (1).

3. The vector tooth placement roller cone bit of claim 1, wherein:

the included angle between the tooth crest direction of at least one cutting tooth (4) in the vector tooth distribution row and the tooth crest directions of the other cutting teeth (4) is 0-90 degrees.

4. A vector bit according to any one of claims 1 to 3, wherein:

the vector tooth distribution row is arranged on the outer tooth row or/and the inner tooth row of the cone (3).

5. A vector bit according to any one of claims 1 to 3, wherein:

the cutting teeth (4) comprise hard alloy teeth (41) and milling teeth (42), and a plurality of insert tooth rows and/or milling tooth rows and/or steel insert mixed tooth rows are arranged on the cone (3);

the hard alloy teeth (41) are embedded on the embedded tooth row, the milling teeth (42) are arranged on the milling tooth row, and the hard alloy teeth (41) and the milling teeth (42) are alternately arranged on the steel embedded mixed tooth row.

6. The vector tooth placement roller cone bit of claim 5, wherein:

the hard alloy tooth (41) is any one of a wedge-shaped tooth, a partial wedge-shaped tooth or a spoon-shaped tooth, and the cobalt content of the hard alloy tooth (41) is 10% -25%.

7. The vector tooth placement roller cone bit of claim 5, wherein:

the diameter of the hard alloy teeth (41) is 6-20 mm, and the diameter of the hard alloy teeth (41) located in the outer row of the cone (3) is 100% -200% of the diameter of the hard alloy teeth (41) located in the inner row of the cone (3).

8. A vector bit according to any one of claims 1 or 2, wherein:

the number of the cutting teeth (4) on the same tooth row is even, the tooth crest direction of the cutting teeth (4) with the even numbers is perpendicular to the rotation direction of the roller bit (1), the tooth crest direction of the cutting teeth (4) with the odd numbers is parallel to the rotation direction of the roller bit (1), and the cutting teeth (4) with the odd numbers and the cutting teeth (4) with the even numbers are arranged at intervals.

9. A vector bit according to any one of claims 1 to 3, wherein:

the roller bit is a tricone bit, the tricone bit comprises a first roller cone (31), a second roller cone (32) and a third roller cone (33), and at least one roller cone (3) in the first roller cone (31), the second roller cone (32) and the third roller cone (33) is provided with the vector tooth arrangement row.

10. The vector tooth placement roller cone bit of claim 9, wherein:

the diameters of the cutting teeth (4) of the outer tooth rows of the first cone (31), the second cone (32) and the third cone (33) are the same or different.

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